class Solution {
public:
    int busyStudent(vector<int>& startTime, vector<int>& endTime, int queryTime) {
            int count = 0;
            for(int i = 0; i < startTime.size(); i++) {
                if(queryTime >= startTime[i] && queryTime <= endTime[i]) {
                    count++;
                }
            }
            return count;
    }
};